No, I'm just making that up - based on many, many ears of catching topside watches playing with their weapons.
Way back when, during Sub School, I had the 8-midnight watch at the Badge and Pass office at New London. When it slowed down, I was back talking to the Duty Officer when we heard a shot from just outside. Two Marines were playing quick-draw in the guard shack, and one shot the other at point-blank range. The bullet scrambled his insides, and never came out. The shooter was convicted at Court-Martial (I assume voluntary manslaughter).